Depolymerization process of low molecular weight PLA through hydrolysis
발표자
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초록
내용
High purity lactide was synthesized through chemical recycling of Polylactic acid (PLA) in life. Recycled PLA made into pellets/flakes through physical processing was decomposed to a Mn = 5,000 about 24h at 100 ℃, and the molecular weight tended to decrease as the time and temperature of hydrolysis increased. Low molecular weight PLA was able to produce L-lactide through a back-biting mechanism using a Sn/Zn-based organometallic catalyst. D-, L-, and meso-lacide isomers are produced from chemical recycled PLA, and the L-form was mainly analyzed because it has excellent mechanical properties. High performance liquid chromatography was used to confirm the purity of the regenerated lactide, and nuclear magnetic resonance was used for structural analysis. High purity lactide could be produced by removing impurities through the purification process using a solvent.